WMO Report Finds Asia's Groundwater Draining Fast as Rivers Hit Multi-Decade Lows

Samstag, 19. September 2026

Rivers around the world had one of their driest years in more than three decades in 2025, and Asia bore a disproportionate share of the damage, according to a World Meteorological Organization report released September 17, 2026. The findings paint a stark picture of a continent where groundwater depletion, pollution and climate-driven extremes are converging on the same river basins that hundreds of millions of people depend on for drinking water, irrigation and food production.

The WMO report found that groundwater deficits persisted across many regions through the year, with recurrent droughts and floods intensifying rather than easing. Asia and Africa together accounted for at least half of all recorded water-related extreme events globally over the past five years, and more than 80% of the deaths associated with them, the report said.

Nowhere is the groundwater strain more visible than in High Mountain Asia, the mountainous belt feeding the continent's largest river systems. Nearly two-thirds of the region experienced declining groundwater levels between 2003 and 2020, with the steepest losses concentrated in heavily populated, intensively irrigated basins including the Ganges-Brahmaputra, the Indus and the Amu Darya. These basins support agriculture for a large share of South and Central Asia's population, meaning sustained groundwater loss carries direct consequences for food security as well as drinking water access.

Water quality compounds the supply problem. In China, up to 90% of groundwater is contaminated by human, agricultural and industrial waste, and roughly 70% of rivers and lakes are considered unsafe for human use, underscoring that scarcity and contamination are now intertwined challenges across much of the continent.

The pressure is not confined to already-populous river basins. In Central Asia, governments in Kazakhstan and Uzbekistan are committing billions of dollars to mining, nuclear power, data centers and other AI-driven infrastructure at precisely the moment when regional water supplies are becoming less abundant, less predictable and more constrained by competing legal claims, according to recent reporting on the region's development trajectory.

Rapid urbanization, industrialization, deforestation and the loss of coastal buffers such as mangroves and coral reefs are compounding the strain, the WMO and allied researchers note, while a warming climate brings longer droughts punctuated by heavier, more destructive rainfall. Development bodies including the Asian Development Bank have pointed to nature-based infrastructure as a lower-cost complement to conventional engineering for buffering the region's water systems against these swings.

For groundwater-dependent utilities and irrigation districts across South, Southeast and Central Asia, the WMO findings reinforce a message increasingly familiar to water managers worldwide: aquifers that took decades or centuries to fill can be drawn down in a fraction of that time, with recovery timelines that may not match the pace of demand growth.